EP0379857B1 - Procédé et dispositif pour fabriquer des objets en matière synthétique thermoplastique expansée - Google Patents

Procédé et dispositif pour fabriquer des objets en matière synthétique thermoplastique expansée Download PDF

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Publication number
EP0379857B1
EP0379857B1 EP90100069A EP90100069A EP0379857B1 EP 0379857 B1 EP0379857 B1 EP 0379857B1 EP 90100069 A EP90100069 A EP 90100069A EP 90100069 A EP90100069 A EP 90100069A EP 0379857 B1 EP0379857 B1 EP 0379857B1
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EP
European Patent Office
Prior art keywords
steam
wall parts
mold
mold cavity
mold wall
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Expired - Lifetime
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EP90100069A
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German (de)
English (en)
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EP0379857A1 (fr
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Hans Erlenbach
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Individual
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Priority to AT90100069T priority Critical patent/ATE94462T1/de
Publication of EP0379857A1 publication Critical patent/EP0379857A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould

Definitions

  • the invention relates to a process for the production of moldings from foamed, thermoplastic, which provides for pre-expanded plastic particles to be introduced into a mold cavity using an air stream and distributed therein and combined with further foaming to form a mold, in which process the mold cavity is combined with its filling of pre-expanded thermoplastic plastic particles surrounding mold wall parts are heated to a desired mold temperature by introducing steam under pressure into at least one steam chamber arranged on the outer sides of the mold wall parts, and after heating the mold wall parts, steam is transferred from the steam chamber into the mold cavity and in its filling is, whereby the plastic particles are further foamed under the action of heat and steam and welded or sintered together, and by which method the molding thus formed is removed from the molds r surfaces of the mold cavity cooled and removed from the mold cavity after substantially reaching its shape retention.
  • the invention also relates to an apparatus for carrying out this method, which is provided with a divided mold which forms a mold cavity between mold wall parts.
  • the sprayed water or condensate condenses any steam residues present in the steam chambers, and steam residues are to be withdrawn through the nozzles in the mold wall parts from the molding taking up the mold cavity into the steam chamber.
  • steam residues are to be withdrawn through the nozzles in the mold wall parts from the molding taking up the mold cavity into the steam chamber.
  • considerable parts of the steam already condense when introduced into the mold cavity ie between the still relatively cool, expanding plastic particles and hinder the welding of the plastic particles.
  • the expanded plastic particles combined to form the molding make it considerably more difficult for steam residues to flow back into the steam chamber, so that the steam introduced into the mold cavity essentially condenses in the molded body.
  • the moldings produced in this way are therefore fundamentally moist and usually have to be dried more or less before they are used for their intended purpose.
  • the pressure-tight design of the mold cavity relative to the steam chamber requires pressure-resistant, relatively thick-walled design and thus high heat capacity of the mold wall parts, which makes high energy requirements necessary for the implementation of this method.
  • equipping all steam transfers in the mold wall parts with valve devices requires a high level of mechanical effort and thus very high production costs.
  • the object of the invention is an improved method and an improved one To create a device for the production of foam moldings, in that on the one hand only relatively small pressure differences occur between the mold cavity and the steam chamber assigned to the mold wall parts and thereby the use of thin-walled mold wall parts with only relatively small heat capacity is made possible.
  • the temperature difference between the heated state and the cooled state of the mold wall parts should be reduced to a minimum in order to limit the energy losses to a minimum. After all, the time required for a working cycle of the molding machine should be as short as possible. In everything, it should be ensured that the moldings removed from the mold cavity have smooth, true-to-form surfaces and are sufficiently dry for their use, that is to say they do not require any additional drying treatment.
  • This object is achieved in the process according to the invention in that during the heating of the mold wall parts within the mold cavity between the plastic particles of the filling, an air inclusion with at least the same pressure as that of the steam used for heating the mold wall parts is maintained and thus the penetration of the steam between the plastic particles of the filling It is prevented that for the admission of steam into the mold cavity after the heating of the mold wall parts by compressed air, the air inclusion is flushed away and the filling of plastic particles in the mold cavity is flowed through with steam, such that the heating and welding or sintering of the plastic particles without condensation or with only very low condensate formation is carried out.
  • the invention achieves that inside the mold cavity is maintained at approximately the same pressure as in the steam chamber formed on the outside of the mold wall parts in all process steps, that is to say when filling the mold cavity with foamable plastic particles, during heating of the mold wall parts and also during steaming of the plastic particles to be foamed and welded or sintered.
  • the flow through the mold cavity set up according to the invention and its filling with steam after the air inclusion has been rinsed away offers the particular advantage that condensate can scarcely be formed when steaming, ie foaming and welding or sintering, or condensate that forms is carried away by the steam flowing through becomes.
  • the invention offers particularly favorable possibilities for more precisely differentiating the individual process steps from each other, less air leakage from the mold cavity into the steam chamber during the heating of the mold wall parts can be accepted or can be set up in order in this way to prevent the penetration of steam into the mold cavity and in its filling during heating of the mold wall parts with certainty.
  • the invention achieves in a simple manner that the steam passes from the steam chamber into the mold cavity only within a precisely defined period of time within the process cycle, while in the known processes for the production of dry molded parts, the complete or temporary sealing of the mold cavity compared to the Steam chambers is problematic, the method according to the invention is characterized in that it makes it possible to dispense with any sealing elements between the mold cavity and the steam chambers and thus, among other things, to simplify the design of the molding tools.
  • the cycle time in the process according to the invention can be considerably reduced compared to that in conventional processes.
  • a substantial reduction in the amount of energy to be used is also achieved in the method according to the invention.
  • a device is particularly suitable, which is based on a divided mold forming a mold cavity between mold wall parts, in the mold tool parts of which at least one steam chamber is formed on the outside of the mold wall parts, which is controlled by means of controllable valves with a steam supply the outside air and can be connected to a suction device (vacuum device), at least one device working with air flow for introducing pre-expanded plastic particles into the mold cavity and for admitting the amount of air which builds up and maintains the air pressure in the mold cavity, and passages are provided on the mold wall parts to let out the air used for filling and to let in the steam used to weld or sinter the plastic particles.
  • a suction device vacuum device
  • this device is to be characterized in that the mold cavity is connected via at least one connecting line leading to the outside of the foaming device to a valve-controlled operating line for supplying and discharging compressed air and extracting steam, during each of the passages formed on and / or between the mold wall parts Both for the discharge of the compressed air used for filling from the mold cavity and for the admission of the steam used for welding the plastic particles into the mold cavity and is arranged at a location suitable for both functions and thus forms a passage connection between the steam chamber and the mold cavity.
  • the example in FIGS. 1 to 4 is a device for producing moldings foamed plastic, for example foamed polystyrene.
  • the foaming device 10 shown in FIG. 1 has two steam chamber halves, namely a hood part 11 and a core part 12.
  • One or more corresponding mold wall parts 15 and 16 are inserted into each of these steam chamber halves.
  • a mold cavity 17 is formed between the two mold wall parts 15 (hood) and 16 (core).
  • the hood part 11 and the core part 12 are separable from one another and are brought together to close the mold and sealed against one another by means of a seal 18 to form a closed interior in which the mold wall parts 15 and 16 are inserted.
  • the mold wall parts 15 and 16 are fastened by means of such holders 19 in the outer wall parts of the steam chamber halves 11 and 12, which form passages 20, so that when the mold is closed, the interior space enclosed by the two steam chamber halves 11 and 12 forms a common steam chamber 21, the mold wall parts 15 and 16 sit within the steam chamber 21 at their peripheral edges.
  • passages 43 in the form of slots which extend in the circumferential direction of the mold cavity 17 and are approximately 0.2 mm wide and up to several centimeters long are formed on these peripheral edges.
  • the edge regions of the mold wall parts 15 and 16 are designed such that the peripheral edge of the hood-shaped mold wall part 15 sits sealingly on the peripheral edge of the core-shaped mold wall part 16.
  • nozzle-shaped passages 43 ' are arranged all around at intervals which provide a connection between the mold cavity which can be flowed through by air and steam 17 and the steam chamber 21 form.
  • the mold wall part 16 can be fitted in the steam chamber part 12 with elastically buffering fastening elements (44) in both versions.
  • At least one steam inlet 22 with a steam inlet valve 23 centrally controlled on the machine and at least one steam outlet 24 with a likewise centrally controlled steam outlet valve 25 are connected to the steam chamber 21. Furthermore, a vacuum connection 26 with a centrally controlled suction valve 27 is connected to the steam chamber 21.
  • Spray devices 28 can also be used in the steam chamber 21 for applying a cooling liquid. These spray devices 28 are also equipped with centrally controlled valves 29. They serve to moisten the surface of the mold wall parts 15 and 16 facing the steam chamber 21 for cooling them.
  • the structure and operation of these facilities can correspond to German patent application P 38 36 875.7.
  • At least one connecting line 30 is connected to the mold cavity 17, which in the example shown is guided through the mold wall part 15 and through the steam chamber hood 11.
  • the filling device 31 for the prefoamed plastic particles to be processed is attached to this connecting line 30.
  • This filling device has a closed raw material container 32 and is known per se.
  • a sleeve 35 is axially displaceably mounted in the connecting line 30 between the closed position, which is shown in full in FIG. 1, and the open position shown in broken lines.
  • this sleeve 35 has through holes 36 in its sleeve plate, which, however, do not allow the passage of pre-expanded plastic particles.
  • channels 36 'bridging the sleeve plate in the closed position could also be provided in the wall of the connecting line 30, as indicated by dashed lines in FIG. 1.
  • An operating line 37 is connected to the connecting line 30 and has the valves required for the operation of the molding tool: a centrally controlled filling air valve 38, to which the air required for operating the filling device 31 in the manner of an injector and for distributing the plastic particles in the mold cavity 17 is supplied, a centrally controlled back pressure valve 39, to which compressed air is supplied at a pressure which is the same or something is higher than the pressure of the water vapor introduced into the steam chamber 21, a steam discharge valve 40 with a downstream, adjustable flow restrictor 41 for releasing air contained in the mold cavity and releasing steam flushing through the mold cavity and a suction valve 42 which is connected to a vacuum device.
  • a centrally controlled filling air valve 38 to which the air required for operating the filling device 31 in the manner of an injector and for distributing the plastic particles in the mold cavity 17 is supplied
  • a centrally controlled back pressure valve 39 to which compressed air is supplied at a pressure which is the same or something is higher than the pressure of the water vapor introduced into the steam chamber 21
  • This device is suitable for carrying out the following special method for producing moldings from foamed plastic.
  • the procedure is explained as follows using FIG. 4: At the beginning of the working cycle, the mold is first closed, so that a closed, uniform steam chamber 21 is formed on the sealing device 18 by the two steam chamber parts 11 and 12, apart from the valve-controlled connections. If the mold is closed, the filling device 31 is started. For this purpose, the sleeve plate 35 is moved into the open position shown in dashed lines. The raw material valve 34 and the filling air valve 38 are opened. The back pressure valve 39 and the steam discharge valve 40 are closed, while the steam outlet valve 25 on the steam chamber 21 is open.
  • the sleeve plate is moved into the lower end position, while the filling air valve 38 and the raw material valve 34 remain open for a period of time, for example, between 0.1s and 1s, so that all in the Connection line 33 existing plastic particles are returned to the raw material container.
  • the back pressure valve 39 and the steam inlet valve 23 are opened.
  • the steam chamber 21 is rinsed with steam, the air present there being rinsed out until the steam outlet valve 25 on the steam chamber 21 is closed after a rinsing period ⁇ t2 since the steam inlet valve 23 has opened.
  • the steam chamber 21 is now filled with saturated steam until a pressure which is desired for heating the mold wall parts 15 and 16 has built up.
  • compressed air is introduced from the back pressure valve 39 into the mold cavity 17 until a back pressure has built up there, which is as high as the pressure of the steam in the steam chamber 21 or even slightly exceeds it.
  • the build-up of the back pressure in the mold cavity 17 in comparison with the pressure of the saturated steam built up in the steam chamber 21 can be regulated by manual adjustment or by using a differential pressure valve.
  • the build-up of the back pressure in the mold cavity 17 prevents steam from reaching the steam chamber 21 via the passages 43 into the mold cavity 17. Rather, some compressed air will flow from the mold cavity 17 through the passages 43 into the steam chamber 21.
  • the foamed plastic particles are welded by means of steam.
  • the back pressure valve 39 is closed and the steam release valve 40 is opened after the flow restrictor 41 has been set to a desired flow value. This reduces the pressure of the air between the plastic particles.
  • steam is pressed from the steam chamber 21 and with constant subsequent delivery via the open steam inlet valve 23 at the passages 43 into the mold cavity 17 and through the porous plastic filling of the mold cavity.
  • This steam which flows the filling of the mold cavity 17 in the manner of a burst of steam, then passes through the bores 36 of the sleeve plate 35 and through the connecting line 30, the operating line 37, the steam release valve 40 and the flow restrictor 41 to the outside.
  • This steam flow ensures that the pressure difference between the mold cavity 17 and the steam chamber 21 is only as small as is necessary for the desired flow behavior.
  • This welding of the plastic particles by means of steam flushing can be carried out over a period of, for example, 1 s.
  • the saturated steam used for welding can have a temperature between 110 ° C and 160 ° C depending on the material.
  • the steam release valve 40 and the steam inlet valve 23 are closed.
  • the valves 29 for supplying coolant are opened if necessary.
  • the suction valves 27 and 42 are also opened. In this way, the steam is sucked out at the same time the connecting line 30 and the operating line 37 as well as the suction of the steam from the steam chamber 21.
  • Condensate or cooling liquid sprayed on the surface of the mold wall parts 15 and 16 facing the steam chamber 21 are also evaporated, so that the mold wall parts 15 and 16 are sucked off be cooled.
  • the mold wall parts are heated to 110 ° C. to 160 ° C. by means of the saturated steam supplied to the steam chamber 21, while during the cooling process the temperature on the mold wall parts 15 and 16 is reduced to about 60 ° C. to 100 ° C., depending on the material becomes.
  • the suction valve 27 has to be closed and the steam chamber has to be ventilated, while the suction valve 42 can still remain open in order to hold the molding on the mold wall part 15.
  • the suction valve 42 is then to be closed and one of the compressed air valves 38 or 39 may have to be opened briefly, if it is desired to push off the molded product from the molded wall part 15 by means of compressed air. This completes the work cycle and must then be repeated as described.
  • FIG. 5 The embodiment of the foaming mold shown in FIG. 5 has basically the same structure like the tool according to FIG. 1.
  • Figure 5 shows a mold cavity 17 ', which is designed for the formation of a molding with an intermediate wall.
  • Additional passage openings 43 ' are therefore provided there in the molding wall 16'.
  • FIG. 5 shows on the mold wall part 16 ', the connecting lines 30' and operating lines 37 ', valves 45 preventing the filling air from entering the mold cavity 17 or 17 'is let in.
  • the operating sequence and the control of these devices are analogous to the above-described operating and procedure for the device according to FIG. 1.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Claims (21)

  1. Procédé de fabrication d'articles moulés en matière thermoplastique expansée qui prévoit d'introduire des particules de matière plastique pré-expansée dans la chambre (17, 17') d'un moule en utilisant un flux d'air, de les répartir dans ladite chambre et de les lier pour former un article moulé en poursuivant leur expansion, procédé dans lequel on chauffe à une température de moulage souhaitée les parties de paroi (15, 16) du moule qui entourent la chambre de moulage (17, 17') avec sa charge de particules pré-expansées de matière thermoplastique en introduisant de la vapeur d'eau sous pression dans au moins une chambre de vapeur (21) agencée sur la face extérieure des parties de paroi de moule (15, 16), après chauffage des parties de paroi de moule (15, 16) on fait passer la vapeur de la chambre de vapeur (21) dans la chambre de moulage (17, 17'), ce qui a pour effet d'entraîner une expansion supplémentaire des particules de matière plastique sous l'action de la chaleur et de les souder entre elles ou de les fritter, on refroidit l'article moulé ainsi formé à partir des surfaces de la chambre de moulage (17, 17') et on retire l'article moulé de la chambre de moulage (17, 17') lorsque celui-ci a pratiquement atteint sa stabilité de forme, procédé caractérisé par le fait que, pendant le chauffage des parties de paroi de moule (15, 16), on maintient à l'intérieur de la chambre de moulage (17, 17'), entre les particules de matière plastique de la charge, de l'air emprisonne à une pression qui est au moins égale à celle de la vapeur utilisée pour le chauffage des parties de paroi de moule (15, 16) et on empêche ainsi la pénétration de vapeur entre les particules de matière plastique et par le fait que, pour l'admission de vapeur dans la chambre de moulage (17, 17') après chauffage des parties de paroi (15, 16), on évacue la poche d'air en relâchant la pression et on fait circuler de la vapeur dans la charge de particules de matière plastique contenue dans la chambre de moulage (17, 17') de manière telle que le réchauffage et le soudage voire le frittage des particules ait lieu sans formation de condensat ou avec une très formation de condensat seulement.
  2. Procédé selon la revendication 1, caractérisé par le fait que la poche d'air qui est maintenue entre les particules de matière plastique, pendant toute la durée de la phase de chauffage, après remplissage de la chambre de moulage (17, 17') est maintenue à une pression telle par rapport à celle de la vapeur utilisée pour chauffer les parties de paroi de moule (15, 16) que seule une quantité d'air négligeable passe de la chambre de moulage (17, 17') dans la chambre de vapeur (21), pression qui est cependant suffisante pour empêcher de manière sûre la pénétration de vapeur dans la charge de la chambre de moulage (17, 17') pendant le chauffage des parties de paroi de moule (15, 16).
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la poche d'air maintenue pendant la phase de chauffage des parties de paroi de moule (15, 16) est produite au moyen d'air comprimé pré-chauffé.
  4. Procédé selon la revendication 3, caractérisé par le fait que l'air comprimé utilisé pour former la poche d'air est réchauffé à une température qui est inférieure à la température de ramollissement de la matière plastique à travailler, par exemple à une température comprise entre 60 °C et 70 °C dans le cas de polystyrène expansé.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait qu'au début de la phase de chauffage, la chambre de vapeur (21) agencée sur la face extérieure des parties de paroi de moule (15, 16) est balayée par de la vapeur pendant un laps de temps Δt₂ allant jusqu'à 1 s, puis la vapeur utilisée pour le chauffage est maintenue dans la chambre de vapeur (21) et amenée à la pression souhaitée pour le chauffage.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé par le fait que le refroidissement des parties de paroi de moule (15, 16) est obtenu par vaporisation de condensat déposé sur la face extérieure des parties de paroi (15, 16) et/ou de condensat appliqué sur la face extérieure des parties de paroi de moule (15, 16) par production d'une dépression.
  7. Procédé selon la revendication 6, caractérisé par le fait que l'on pulvérise un mélange de vapeur d'eau et de condensat de vapeur d'eau sur la face extérieure des parties de paroi de moule (15, 16) à des fins de refroidissement.
  8. Procédé selon la revendication 6 ou 7, caractérisé par le fait que, pour refroidir les parties de parois de moule (15, 16) et l'article moulé, on réalise sensiblement simultanément le vide dans la chambre de moulage (17, 17') contenant l'article moulé et dans au moins une chambre de vapeur (21) agencée sur la face extérieure des parties de paroi de moule (15, 16).
  9. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 8, comportant un moule en plusieurs parties avec des parties de paroi (15, 16) qui définissent entre elles une chambre de moulage (17, 17') et sur la face extérieure desquelles est agencée au moins une chambre de vapeur qui, par des vannes (23, 25, 27), peut être mise en communication de manière contrôlée avec une entrée de vapeur, avec l'air extérieur et avec un dispositif d'extraction, et comportant, dans les parties de paroi de moule (15, 16), des passages (42, 43') menant à la chambre de vapeur (21) aux fins d'évacuer l'air utilise pour le remplissage et d'admettre la vapeur utilisée pour le soudage ou le frittage des particules de matière plastique, caractérisé par le fait que la chambre de moulage (17, 17'), par l'intermédiaire d'au moins une conduite de liaison (30, 30') menant vers l'extérieur de la partie chambre de vapeur (11, 12), communique avec une conduite de service (37, 37') commandée par vanne pour l'admission d'air comprime et l'évacuation de vapeur, tandis que chacun des passages (43, 43') aménagés dans les parties de paroi de moule(15, 16) est agencé simultanément pour l'évacuation hors de la chambre de moulage de l'air comprimé utilisé pour le remplissage et sous forme de conduite de circulation libre entre la chambre de vapeur (21) et la chambre de moulage (17, 17') et est disposé en un emplacement adapté pour les deux fonctions.
  10. Dispositif selon la revendication 9, caractérisé par le fait que la conduite de liaison (30) reçoit également le dispositif d'introduction des particules de matière plastique pré-expansée dans la chambre de moulage (17, 17').
  11. Dispositif selon la revendication 10, caractérisé par le fait que la conduite de liaison (30) qui présente une section large adaptée pour l'introduction des particules de matière plastique pré-expansée est pourvue d'une plaque (35) en forme de piston comme élément de fermeture de la chambre de moulage après remplissage de celle-ci et par le fait que des orifices (36, 36') de communication avec la chambre de moulage sont associés à ladite plaque (35).
  12. Dispositif selon la revendication 11, caractérisé par le fait que la plaque est pourvue d'orifices de passage (36).
  13. Dispositif selon l'une des revendications 9 à 12 comportant deux parties de moule séparables, caractérisé par le fait que les parties de parois de moule (15, 16) sont pourvues, au niveau de la ligne de joint obtenue lorsque le dispositif de fabrication d'articles en matière plastique expansée (10) est fermé, de passages (43) qui restent ouverts même lorsque le dispositif est fermé et relient la chambre de moulage (17, 17') à la chambre de vapeur (21) formée côté extérieur des parties de parois de moule (15, 16).
  14. Dispositif selon la revendication 13, caractérisé par le fait que les passages (43) sont agencés sous la forme d'au moins une fente disposée le long de la ligne de joint lorsque le dispositif de fabrication d'articles en matière plastique expansée (10) est fermé.
  15. Dispositif selon la revendication 13, caractérisé par le fait que les passages (43) sont agencés sous la forme d'une ligne interrompue de fentes, disposée le long de la ligne de joint lorsque le dispositif de fabrication d'articles en matière plastique expansée (10) est fermé.
  16. Dispositif selon la revendication 14, caractérisé par le fait que la ou les fente(s) de passage a (ont) une largeur sensiblement de 0,2 mm.
  17. Dispositif selon l'une des revendications 13 à 16, caractérisé par le fait que la ligne de joint entre les parties de paroi (15, 16) assemblées lorsque le dispositif de fabrication d'articles en matière plastique expansée (10) est fermé est située essentiellement à la périphérie de la chambre de moulage (17, 17').
  18. Dispositif selon l'une des revendications 9 à 17, caractérisé par le fait qu'il est prévu une pluralité de conduites de liaison (30, 30') menant de la chambre de moulage (17, 17') vers l'extérieur, parmi lesquelles une ou plusieurs conduite de liaison (30) sont pourvues d'un dispositif (31) d'introduction des particules de matière plastique pré-expansée (10) dans la chambre de moulage (17, 17').
  19. Dispositif selon la revendication 18, caractérisé par le fait que toutes les conduites de liaison (30, 30') sont connectées à la même conduite de travail
  20. Dispositif selon l'une des revendications 9 à 19, caractérisé par le fait que les parties de paroi de moule (15, 16) sont tenues par des éléments de fixation (19, 44) des parties de parois extérieures de la chambre de vapeur (11, 12) qui laissent libres les passages (20) et les parties de parois extérieures sont assemblées avec étanchéité en formant une chambre de vapeur (21) commune entourant toutes les parties de parois de moule (15, 16) lorsque le dispositif de fabrication d'articles en matière plastique expansée (10) est fermé.
  21. Dispositif selon la revendication 20, caractérisé par le fait que les parties de parois de moule (16) placées dans une moitie de chambre de vapeur, par exemple dans la partie principale (12), sont montées sur des éléments de fixation (44) amortissants.
EP90100069A 1989-01-24 1990-01-03 Procédé et dispositif pour fabriquer des objets en matière synthétique thermoplastique expansée Expired - Lifetime EP0379857B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100069T ATE94462T1 (de) 1989-01-24 1990-01-03 Verfahren und vorrichtung zum herstellen von formlingen aus aufgeschaeumtem, thermoplastischem kunststoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3902002A DE3902002A1 (de) 1989-01-24 1989-01-24 Verfahren und vorrichtung zum herstellen von formlingen aus aufgeschaeumtem, thermoplastischem kunststoff
DE3902002 1989-01-24

Publications (2)

Publication Number Publication Date
EP0379857A1 EP0379857A1 (fr) 1990-08-01
EP0379857B1 true EP0379857B1 (fr) 1993-09-15

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EP90100069A Expired - Lifetime EP0379857B1 (fr) 1989-01-24 1990-01-03 Procédé et dispositif pour fabriquer des objets en matière synthétique thermoplastique expansée

Country Status (8)

Country Link
US (1) US5100597A (fr)
EP (1) EP0379857B1 (fr)
JP (1) JPH02292027A (fr)
AT (1) ATE94462T1 (fr)
DD (1) DD291506A5 (fr)
DE (1) DE3902002A1 (fr)
ES (1) ES2045567T3 (fr)
IT (1) IT1230738B (fr)

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DE102006035361A1 (de) * 2006-10-19 2008-04-24 Rieter Technologies Ag Geformter Artikel, Vliesstoff sowie deren Herstellung und Verwendung
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IT1399743B1 (it) * 2010-03-15 2013-05-03 Afros Spa Metodo e apparecchiatura per l'erogazione di una miscela poliuretanica in corpi cavi.
DE202013104195U1 (de) * 2013-09-13 2014-12-16 Kurtz Gmbh Vorrichtung zur Herstellung von porösen Formteilen
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CN112497620B (zh) * 2020-11-17 2021-12-14 安徽中巨智能科技有限公司 箱体发泡系统

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CN104271325A (zh) * 2012-05-02 2015-01-07 巴斯夫欧洲公司 用于制备含以力封闭的方式连接至中空体的颗粒泡沫模制品的复合体的方法
CN104271325B (zh) * 2012-05-02 2017-03-08 巴斯夫欧洲公司 用于制备含以力封闭的方式连接至中空体的颗粒泡沫模制品的复合体的方法

Also Published As

Publication number Publication date
EP0379857A1 (fr) 1990-08-01
US5100597A (en) 1992-03-31
IT8921049A0 (it) 1989-06-30
ES2045567T3 (es) 1994-01-16
DE3902002A1 (de) 1990-07-26
DD291506A5 (de) 1991-07-04
ATE94462T1 (de) 1993-10-15
JPH02292027A (ja) 1990-12-03
DE3902002C2 (fr) 1992-10-01
IT1230738B (it) 1991-10-29

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